Sysadmin basics (Debian/Linux, Spamassassin, W32 troubleshooting, Samba)
A general idea of VC++ (Not in any way mandatory, but could be useful)

You’d be working within a small team on a Cool Thing, with any luck the Next Big Thing. Wages aren’t stratospheric right now, but possiblities could be. You’d need to either live near, or be willing to commute to, Kings Cross London.